Disruption Aura
Oracle Text
Enchant artifact
Enchanted artifact has "At the beginning of your upkeep, sacrifice this artifact unless you pay its mana cost."
Card Rulings
12/1/2004 Mana cost includes any requirements for colored mana, although most artifacts don’t have any color requirements.
12/1/2004 If the enchanted artifact has X in its mana cost, X is 0.
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